Does it needs words to explain?.......it's a simply mod with a great result! At first I heard a muddy very laid back sound from this...

15 Feb 2012

Sony CDP-997 modificato Audiophile

This player gave one of the best resul among the Sony's beasts and for sure it was the uglier sounding at all before the upgrade.........for sure the readers would ask themself why..since it's not the very basic...and I would answer that the DSP is so funny thing but no audiophile at all!!!!the processor lay on the signal passage before the DAC.....better switch it off and work for a better hardware as LPF circuit!!!!

I found there an LPF circuit and a buffer stage ...around buffer stage are spottered some transistor reguling the gain....mmmmmm .... too long travel for a little audio signal !

the operational on the pic above is vanished now!!!!!!!!!!!

a new laser unit KSS240 was really very fickle ...and tired..........neded a swap for a new NKS240..but pls don't try to strike the player...don't try even to tip on it....it will skip the track soon!!! :-(

here they are the new dip-8 socket

aaah.....here they are the 4 1/8 resistors swapped for 4 1/4 metal film res.

In the LPF i found 2 operationals ..one for each channel........at first i swap them for 2 motorola33078 ....better say I chose them among a big bunch of them after accurate hearing but at the treshold of the shipment I found them a little bit too harsh...no they couldn't be in the tastes of Sergio so I went straight for a couple of shiny Burr Brown wich model you would ask......OPA2134 !!!!!! the one I brushed out for month ....yes now it's shinig here and in the other Sony of mine (CDP-XE270)

Fujicon TM for decoupling of the two operationals.............panasonic HQ as decoupling around DAC

...and a couple of nichicon muse FG in the output followed by 2 stunning carbon composite resistors!!

Now the sound is really amazing: open ...so detailed and dynamic...a pleasure for the ears!!!! ;-)))